US9986358B2 - Sound apparatus, television receiver, speaker device, audio signal adjustment method, and recording medium - Google Patents

Sound apparatus, television receiver, speaker device, audio signal adjustment method, and recording medium Download PDF

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US9986358B2
US9986358B2 US15/319,393 US201515319393A US9986358B2 US 9986358 B2 US9986358 B2 US 9986358B2 US 201515319393 A US201515319393 A US 201515319393A US 9986358 B2 US9986358 B2 US 9986358B2
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speaker
measurement
change
sound apparatus
unit
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US20170142536A1 (en
Inventor
Hisao Hattori
Junsei Sato
Takeaki Suenaga
Takuto ICHIKAWA
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Sharp Corp
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Sharp Corp
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Assigned to SHARP KABUSHIKI KAISHA reassignment SHARP KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ICHIKAWA, Takuto, HATTORI, HISAO, SUENAGA, TAKEAKI, SATO, JUNSEI
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42203—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] sound input device, e.g. microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/485—End-user interface for client configuration
    • H04N21/4852—End-user interface for client configuration for modifying audio parameters, e.g. switching between mono and stereo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/607—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for more than one sound signal, e.g. stereo, multilanguages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H04S5/005—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation  of the pseudo five- or more-channel type, e.g. virtual surround
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/403—Linear arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/024—Positioning of loudspeaker enclosures for spatial sound reproduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
    • H04R2227/001—Adaptation of signal processing in PA systems in dependence of presence of noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
    • H04R2227/003—Digital PA systems using, e.g. LAN or internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07—Applications of wireless loudspeakers or wireless microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/11—Positioning of individual sound objects, e.g. moving airplane, within a sound field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H04S5/02—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation  of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals

Definitions

  • the present invention relates to a sound apparatus, a television receiver, and a speaker device that have a surround reproduction function, and an audio signal adjustment method of the sound apparatus.
  • the present invention relates to a program causing a computer to operate as a sound apparatus, and a recording medium in which the program is recorded.
  • a sound system that can obtain a high sense of reality by reproducing the audio signal of audio recorded in multi-channels using speakers which are disposed so as to surround the periphery of a user is generally used. Further, a service that distributes the audio of a 5.1-ch system or a 7.1-ch system via recording media, networks, or the like such as broadcast or optical disks is performed. In the sound system including five or seven speakers disposed so as to surround the periphery of the user, the audio signal provided by these systems is also output (reproduced) from the back of the user. Further, a 22.2-ch system that can output audio by a plurality of speakers installed at the upper and the lower of the space where a user exists is also proposed.
  • This technique is a technique that sequentially outputs a test signal from the speakers, receives the test signal by the microphone installed at the position of the user, and changes the delay time, the level, and the like of the audio signal supplied to each speaker based on the result. This technique allows the user to enjoy surround sounds even when using the speaker which is installed at a distance from the recommended disposition position.
  • the measurement of the position of the speaker is performed each time the sound system is used or every time a predetermined period of time is elapsed.
  • the measurement is performed more than necessary, thereby significantly decreasing convenience of the user.
  • the present invention has been made to solve the above-described problems, and a main object thereof is to provide a sound apparatus that prevents the measurement of the position of a speaker from not being performed in a case where the position of the speaker is changed, and that prevents the measurement of the position of the speaker from being performed more than necessary.
  • a sound apparatus that supplies an audio signal to each of a plurality of speakers, including: a detection unit that detects a change in the installation position of at least one speaker; a measurement unit that measures the installation position of at least the speaker of which the installation position is changed among the plurality of speakers, automatically or according to a user operation, after the change is detected by the detection unit; and an adjustment unit that adjusts the audio signal based on the measurement result of the measurement unit.
  • a speaker device that outputs the audio indicated by an audio signal when the audio signal is supplied from a sound apparatus.
  • the speaker device includes an output unit that outputs information for causing the sound apparatus to detect a change in the position of the speaker device, toward the sound apparatus, in a case where the position of the speaker device is changed.
  • an audio signal adjustment method performed by a sound apparatus that supplies an audio signal to each of a plurality of speakers, including: a detection step for detecting a change in the installation position of at least one speaker; a measurement step for measuring the installation position of each of the plurality of speakers, automatically or according to a user operation, after the change is detected by the detection step; and an adjustment step for adjusting the audio signal based on the measurement result in the measurement step.
  • the present invention it is possible to realize a sound apparatus that can prevent the measurement of the position of the speaker from not being performed in a case where the position of the speaker is changed, and prevent the measurement of the position of the speaker from being performed more than necessary.
  • FIG. 1 is a block diagram illustrating an outline of the configuration of a sound system according to an embodiment of the present invention.
  • FIG. 2 is diagram schematically illustrating the configuration of a microphone according to an embodiment of the present invention.
  • FIG. 3 is a flowchart illustrating a flow of processing in the sound system according to an embodiment of the present invention.
  • FIG. 4 is an external view schematically illustrating an outline of the configuration of a sound system according to another embodiment of the present invention.
  • FIG. 5 is a block diagram illustrating an outline of the configuration of a television according to another embodiment of the present invention.
  • FIG. 6 is a block diagram illustrating an outline of the configuration of a wireless speaker according to another embodiment of the present invention.
  • FIG. 7 is a flow chart illustrating a flow of processing in the sound system according to another embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating an outline of the configuration of the sound system 10 according to the present embodiment.
  • the sound system 10 according to the present embodiment includes an AV amplifier 1 (a sound apparatus), speakers 2 (speaker devices), a microphone 3 , a reproduction apparatus 5 , and a television 6 .
  • the AV amplifier 1 is respectively connected to a plurality of speakers 2 , the microphone 3 , the reproduction apparatus 5 , and the television 6 .
  • the speaker 2 incorporates a sensor 202 .
  • the sensor 202 included in the speaker 2 detects the movement of the speaker 2 , and may be, for example, an acceleration sensor or a pressure switch provided at the bottom portion of the speaker as an example.
  • the microphone 3 incorporates a plurality of microphone units (to be described later with reference to FIG. 2 ).
  • a reproduction apparatus 5 for example, a BD player, a DVD player, or the like is included.
  • the AV amplifier 1 functions as the sound apparatus that supplies an audio signal to each of the plurality of speakers 2 .
  • the AV amplifier 1 includes an input/output unit 101 , an audio processing unit 102 (adjustment unit), an amplification unit 103 , an operation unit 104 , a control unit 105 (detection unit), and a measurement unit 106 (detection unit).
  • the input/output unit 101 is connected to the reproduction apparatus 5 and the television 6 .
  • the AV amplifier 1 may be connected to the reproduction apparatus 5 and the television 6 , for example, by wired connection using a HDMI cable or the like, or wireless connection, and the connection is not particularly limited.
  • the input/output unit 101 receives an input of a reproduction signal indicating the content reproduced in the reproduction apparatus 5 , and outputs the input signal to the television 6 .
  • the reproduction signal includes a video signal indicating the video of the content reproduced in the reproduction apparatus 5 , and an audio signal indicating the audio of the content.
  • the video signal is supplied to the television 6 via the input/output unit 101 from the reproduction apparatus 5 .
  • the input/output unit 101 may also have a function of superimposing text information or an image on the video information to be output to the television 6 .
  • the audio signal included in the reproduction signal is input into the AV amplifier 1 via the input/output unit 101 .
  • the audio signals that are input into the AV amplifier 1 are decoded and treated as audio signals of a plurality of channels.
  • the audio signals of the plurality of channels that are decoded are input to the audio processing unit 102 .
  • the audio processing unit 102 performs adjustment processing of adjusting the delay time, the level, and the frequency characteristics of the audio signals of the plurality of channels that are decoded, and outputs the adjusted audio signals to the amplification unit 103 .
  • the audio processing unit 102 further adjusts the audio signals based on the measurement result of the measurement unit 106 to be described later.
  • the audio processing unit 102 may down-mix or up-convert the audio signals depending on the number of speakers 2 connected to the AV amplifier 1 .
  • the audio processing unit 102 may delay the audio signals of the plurality of channels as necessary, and mix the delayed audio signals in a proper proportion, and output the mixed audio signals to the speaker 2 .
  • the audio processing unit 102 may analyze the relationship between the audio signals of the plurality of channels, and newly generate audio signals obtained by interpolating the audio signals of the plurality of channels, and output the interpolated audio signals to the speaker 2 .
  • the amplification unit 103 drives the speaker 2 by amplifying the audio signals of the plurality of channels that are supplied from the audio processing unit 102 , and acquires the output signal of the sensor 202 that is sent from the speaker 2 (sensor signal).
  • the AV amplifier 1 and the speaker 2 are connected to each other by wired connection.
  • the AV amplifier 1 and the speaker 2 may be connected to each other using a dedicated line that is used for the transmission of the audio signal and a dedicated line that is used for the transmission of the sensor signal, the sensor signal may be transmitted being superimposed on the line that is used for the transmission of the audio signal.
  • a method that allocates the frequency band of a high-frequency signal for the transmission (communication) of the sensor signal using a filter may be used.
  • the operation unit 104 receives an operation of a user, and transmits the operation of the user to the control unit 105 .
  • the operation unit 104 may receive the operation of the user via a remote controller.
  • the control unit 105 integrally controls the processing of the AV amplifier 1 .
  • the control unit 105 reflects the operation of the user that is received by the operation unit 104 in the control of each unit.
  • the control unit 105 detects a change in the installation position of at least one speaker 2 of the plurality of speakers 2 .
  • the control unit 105 detects the movement (change) of the installation position of the speaker 2 , based on the sensor signal from the sensor 202 that is acquired by the amplification unit 103 .
  • the control unit 105 manages the movement of the installation position of the speaker 2 by a movement flag indicating that the installation position of the speaker 2 is moved. In a case where it is detected that the installation position of the speaker 2 is moved, the control unit 105 sets the value of the movement flag, for example, to “1” from “0”.
  • the movement flag may be provided for each of the plurality of speakers 2 (that is, one movement flag may correspond to one speaker 2 ), or one movement flag may correspond to the plurality of speakers 2 .
  • the movement flag is not particularly limited.
  • the measurement unit 106 measures the new installation position of each of the plurality of speakers 2 (or only the speaker 2 of which the installation position is changed), automatically or according to the operation of the user (instruction of the user). At this time, prior to the measurement, the microphone 3 is placed at the viewing position (position of the user when the user uses the sound system 10 ) by the user.
  • the measurement unit 106 receives sound reception signals that are input from the connected microphone 3 , and analyzes the installation position, the audio level, and the frequency characteristics, and the like of the speaker 2 that is connected to the AV amplifier 1 , from the received sound reception signals. More specifically, the measurement unit 106 receives the sound reception signals from each of the plurality of microphone units 301 incorporated in the microphone 3 , and analyzes each of the received sound reception signals. The measurement unit 106 measures the installation position of the speaker 2 from the analysis result. The position of the microphone 3 can be calculated, for example, from the known position of the speaker 2 such as the speaker 2 that is not moved. Therefore, in a case where the position of the speaker 2 of which the position is not changed is also measured, the user may not accurately return the position of the microphone 3 to the viewing position at which the microphone is placed at the previous measurement.
  • the measurement unit 106 transmits the analysis result to the audio processing unit 102 such that the analysis result is reflected in the adjustment processing in the audio processing unit 102 .
  • FIG. 2 is a diagram schematically illustrating the configuration of the microphone 3 according to the present embodiment.
  • FIG. 2( a ) is a perspective view of the microphone unit 301 included in the microphone 3
  • FIG. 2( b ) is a front view (a view when viewed from the positive X-axis direction) of the microphone unit 301
  • FIG. 2( c ) is a top view (a view when viewed from positive Z-axis direction) of the microphone unit 301
  • FIG. 2( d ) is a right side view (a view when viewed from negative Y-axis direction).
  • the microphone 3 includes the plurality of microphone units 301 a to 301 d (in the present embodiment, four microphone units).
  • the microphone units 301 a to 301 d are disposed so as to spatially be dispersed (that is, such that at least one microphone unit 301 and other microphone units 301 are not positioned on the same plane).
  • the microphone units 301 a to 301 d are disposed so as to form a three-dimensional (three-axis) orthogonal coordinate system around the microphone units 301 a.
  • the position of the microphone unit 301 a is set as the original point
  • the microphone unit 301 b is positioned on the positive Y-axis
  • the microphone unit 301 c is positioned on the positive X-axis
  • the microphone unit 301 d is positioned on the positive Z-axis, respectively.
  • the microphone units 301 a to 301 d are disposed such that the distances between the microphone unit 301 a and each of the microphone units 301 b to 30 d are all the same.
  • the disposition relationship between the microphone units 301 a to 301 d is not limited thereto.
  • the number of the microphone units 301 is not limited thereto, and there is no problem as long as there is a plurality of microphone units.
  • FIG. 3 is a flowchart illustrating a flow of the processing in the sound system 10 according to the present embodiment.
  • the speaker 2 , the microphone 3 , the reproduction apparatus 5 , and the television 6 are connected to the AV amplifier 1 , and power is supplied to each of these apparatuses by the user (hereinafter, also referred to as power ON).
  • the control unit 105 of the AV amplifier 1 communicates with the speaker 2 , the reproduction apparatus 5 , and the television 6 that are connected, via the input/output unit 101 and the amplification unit 103 , and acquires the type of the connected device by acquiring ID or the like for identifying each device (step S 101 ).
  • the control unit 105 extracts the connection history of each device that is held in a storage unit (not illustrated) of the AV amplifier 1 or the like.
  • the connection history the connection state between the AV amplifier 1 and each device (that is, which device is connected to the AV amplifier 1 ) when the power of the AV amplifier 1 is ON at the previous time (hereinafter, also simply referred to as a “previous connection state”) is read.
  • the control unit 105 determines whether or not there is a change from the previous connection state to the current connection state (step S 102 ), by comparing the previous connection state recorded in the extracted connection history and the current connection state indicated by the type of the connected device that is acquired in step S 101 .
  • control unit 105 displays a message of “Measurement is not performed. Start to perform measurement?” or the like on the screen of the television 6 via the input/output unit 101 (step S 103 ).
  • the control unit 105 determines whether or not an instruction of the user for instructing the AV amplifier 1 to start the measurement of the installation position of the speaker 2 (a speaker position measurement start instruction) is input (step S 104 ).
  • the instruction of the user for instructing the speaker position measurement start may be received, for example, via a remote controller.
  • step S 104 When the speaker position measurement start instruction is input (YES in step S 104 ), the control unit 105 updates the previous connection state recorded in the connection history to the current connection state (step S 105 ), and starts the speaker position measurement processing (step S 106 ).
  • the speaker position measurement processing will be described later.
  • the control unit 105 executes step S 105 and step S 106 in this order will be described, the execution order is not limited thereto, a configuration in which the processing of step S 105 is executed after executing the processing of step S 106 may be also employed.
  • the AV amplifier 1 sequentially measures the installation positions of the speakers 2 . After measuring the installation positions of all of the speakers 2 , the AV amplifier 1 can reflect the measurement result acquired by the measurement unit 106 in the adjustment processing of the audio signal in the audio processing unit 102 . Accordingly, the AV amplifier 1 can provide a good audio reproduction environment (sound field) to the user. As the result of the measurement, in a case where a speaker without any response or a speaker of which characteristics are totally different from those of other speakers is detected, the AV amplifier 1 may stop the use of the speaker. Accordingly, the AV amplifier 1 can prevent necessary audio signals from not being output from the speaker 2 due to the allocation of the signals to such a speaker.
  • the control unit 105 detects a change in the installation position of the speaker 2 by further determining whether or not there is a change in the installation position of the speaker 2 with respect to the AV amplifier 1 (step S 107 ).
  • the control unit 105 may determine whether or not there is a change in the installation position of the speaker 2 with respect to the AV amplifier 1 , by referring to the value of the movement flag associated with each speaker 2 . For example, the control unit 105 may determine that the installation position of the speaker 2 corresponding to the movement flag of which value is set to “1” is changed, and determine that the installation position of the speaker 2 corresponding to the movement flag of which value is set to “0” is not changed.
  • step S 107 In a case where the installation position of the speaker 2 is changed (YES in step S 107 ), it is necessary to measure the current installation position of the speaker 2 , and thus the control unit 105 displays a message such as “Speaker is moved. Start to perform re-measurement?” or the like that requests to start the measurement of the installation position of the speaker, on the screen of the television 6 (step S 108 ).
  • control unit 105 executes the processing of step S 104 to step S 106 .
  • step S 104 In a case where the speaker position measurement start instruction is not input after the message is displayed (NO in step S 104 ), after the speaker position measurement processing (step S 106 ) is executed, or in a case where there is no change in the installation position of the speaker 2 (NO in step S 107 ), the sound system 10 performs a normal operation.
  • the movement flag may correspond to each of the plurality of speakers 2 , or one movement flag may correspond to the plurality of speakers 2 .
  • the control unit 105 can shorten the time required for the processing by performing the speaker position measurement processing for only the speaker 2 corresponding to the movement flag of which the value is set to “1”.
  • the AV amplifier 1 updates the installation position of the speaker 2 by measuring the current installation position of the speaker 2 of which the installation position is changed, and reflects the measurement result in the adjustment processing of the audio signal in the audio processing unit 102 .
  • the AV amplifier 1 updates the installation position of the speaker 2 by measuring the current installation position of the speaker 2 of which the installation position is changed, and reflects the measurement result in the adjustment processing of the audio signal in the audio processing unit 102 .
  • the power of the sound system 10 is turned off by the user with the speaker 2 , the microphone 3 , the reproduction apparatus 5 , the television 6 , and the like connected to the AV amplifier 1 (hereinafter, also referred to as power OFF).
  • the control unit 105 and the operation unit 104 of the AV amplifier 1 wait for the operation of the user with some functions of the AV amplifier 1 activated (that is, a stand-by mode).
  • the control unit 105 continues to communicate with the sensor 202 incorporated in the speaker 2 via the amplification unit 103 .
  • the power of the sound system 10 when the power of the sound system 10 is turned off, the power of other devices included in the sound system 10 is turned OFF, for example, in conjunction with the power OFF of the AV amplifier 1 , the television 6 , or the like.
  • the power of each device may be turned OFF independently.
  • the sensor 202 When the sensor 202 detects the movement of the speaker 2 , the sensor 202 notifies the control unit 105 of a sensor signal indicating that the installation position of the speaker 2 is moved.
  • the control unit 105 records the movement of the installation position of the speaker 2 by setting the value of the movement flag corresponding to the moved speaker 2 to “1” from “0”.
  • the sensor 202 of the speaker 2 may detect the presence or absence of the movement of the speaker 2 , and record the detection result in a recording unit or the like of the speaker 2 (not illustrated) (for example, in a case where the movement of the speaker 2 is detected, the value of the movement flag of the recording unit may be set to “1” from “0”).
  • the measurement unit 106 of the AV amplifier 1 may check the presence or absence of the movement of the speaker 2 .
  • the control unit 105 can detect (check) that the speaker 2 is moved by referring to the movement flag. In a case where it is checked that the installation position of the speaker 2 is not moved by referring to the movement flag (in a case where a change in the installation position of the speaker 2 is not detected), the control unit 105 transitions to the normal operation.
  • the microphone 3 is disposed by the user who is requested to measure the position of the speaker 2 by the message displayed on the television 6 in step S 103 or step S 108 illustrated in FIG. 2 , at the position when the user views the television 6 (hereinafter, also referred to as a viewing position).
  • the user notifies the AV amplifier 1 of the speaker position measurement start instruction using a remote control, and thus the measurement of the installation position of the speaker 2 in the sound system 10 is started.
  • the AV amplifier 1 of the AV amplifier 1 sequentially outputs a measurement audio signal from the measurement unit 106 to each of the plurality of speakers 2 via the audio processing unit 102 and the amplification unit 103 .
  • each speaker 2 outputs the measurement audio representing the received measurement audio signal.
  • the sound of the measurement audio that is output from one speaker 2 among the speakers 2 is received by the microphone 3 , and the received sound is input to the measurement unit 106 of the AV amplifier 1 as the sound reception signal.
  • the measurement unit 106 acquires the position, the audio level, the frequency characteristics, and the like of the speaker by analyzing the sound reception signal that is input, and supplies the acquired analysis result to the audio processing unit 102 .
  • the audio processing unit 102 sets the adjustment value and the like in the adjustment processing (delay time, level, and frequency characteristics, and the like) to be performed on the audio signals of the plurality of channels, based on the supplied analysis result.
  • the information that can be acquired through the microphone 3 and the information that is obtained as the analysis result are changed by the measurement audio signal that is used as the measurement audio.
  • white noise is used as the measurement audio, and thus the measurement unit 106 can acquire the delay time of the speaker by detecting the rise of the sound reception signal from the microphone 3 , and acquire the frequency characteristics of the speaker by analyzing the frequency characteristics of the sound reception signal.
  • a time-stretched pulse or an M-sequence signal is used as the measurement audio, and thus it is possible to calculate an impulse response from the sound reception signal. Since the impulse response indicates a response as a system, it is possible to obtain various analysis results such as a delay time, phase characteristics, frequency characteristics, or the like from the impulse response. Thus, it is possible to use the various analysis results in the setting (correction) of the adjustment value of the adjustment processing in the audio processing unit 102 .
  • the delay time in the present embodiment refers to the propagation time of a sound wave during a period for which the sound wave is radiated (output) from the speaker 2 and propagated to the microphone 3 .
  • the measurement unit 106 can recognize the distance between the speaker 2 and the microphone 3 by multiplying the delay time by the sound speed. In a case where a delay time due to another factor other than the time for which a sound is propagated through a space is considered in the delay time, it is preferable that the addition of the delay time due to another factor is considered in advance. Since the sound speed is changed depending on the temperature, it is preferable to correct the sound speed by providing a temperature sensor.
  • the measurement unit 106 analyzes each signal from the plurality of microphone units 301 incorporated in the microphone 3 , and calculates the delay time of each signal.
  • the microphone units 301 are disposed so as to be spatially distributed, and thus it is possible to calculate the distance between each of the microphone units 301 and the speaker 2 . Therefore, the measurement unit 106 can calculate the relative position of the speaker 2 with respect to the microphone 3 , and thus calculate the installation position of the speaker 2 . In this way, in the present embodiment, the measurement unit 106 can measure the installation position of the speaker 2 by calculating the relative position of the speaker 2 with respect to the microphone 3 .
  • the speaker position measurement processing is executed in a case where the speaker position measurement start instruction by the user is received in S 104 illustrated in FIG. 3 .
  • the speaker position measurement processing is executed in a case where it is determined that there is a change in the connection state in step S 102 illustrated in FIG. 3 (YES in S 102 ), without displaying a message on the television 6 .
  • the speaker position measurement processing may be automatically executed in a case where it is determined that there is a change in the connection state in step S 102 illustrated in FIG. 3 (YES in S 102 ), without displaying a message on the television 6 .
  • the microphone 3 is placed in advance at the position at which the user views the television 6 or in the vicinity of the position.
  • the AV amplifier 1 can measure the installation position of the speaker 2 by the measurement unit 106 . Accordingly, the AV amplifier 1 can prevent the measurement of the installation position of the speaker 2 from not being performed in a case where the installation position of the speaker 2 is changed. On the other hand, the AV amplifier 1 does not perform the measurement of the installation position of the speaker 2 in a case where the installation position of the speaker 2 is not changed. Therefore, the AV amplifier 1 can prevent the measurement of the position of the speaker 2 from not being performed in a case where the position of the speaker 2 is changed, and prevent the measurement of the position of the speaker 2 from being performed more than necessary.
  • the AV amplifier 1 can prevent the measurement of the position of the speaker 2 from being performed more than necessary, and thus it is possible to reduce the stress on the user.
  • FIG. 4 is an external view schematically illustrating an outline of the configuration of a sound system 20 of the present embodiment.
  • the sound system 20 includes a reproduction apparatus 5 , a television 7 (sound apparatus, television receiver), and a plurality of wireless speakers 8 (speaker devices).
  • the television 7 is connected to the reproduction apparatus 5 by wired connection using a HDMI cable or the like.
  • the television 7 is connected to the wireless speakers 8 by wireless connection.
  • the television 7 incorporates speakers 704 and microphones 710 .
  • FIG. 5 is a block diagram illustrating an outline of the configuration of the television 7 according to the present embodiment.
  • the television 7 functions as a sound apparatus that supplies an audio signal to each of the plurality of speakers 2 .
  • the television 7 includes an input/output unit 701 , an audio processing unit 702 (adjustment unit), an amplification unit 703 , a plurality of speakers 704 , a video processing unit 705 , a display unit 706 , an operation unit 707 , a control unit 708 (detection unit), a measurement unit 709 (measurement unit), a plurality of microphones 710 , and a wireless communication unit 711 .
  • a tuner, external connection terminals (both not illustrated), and the like are provided, and an antenna, an external device, and the like are connected to the input/output unit 701 .
  • the input/output unit 701 and the external device are connected to each other by, for example, HDMI (registered trademark).
  • the broadcast wave received by the tuner of the input/output unit 701 is decoded and divided into a video signal and an audio signal.
  • the input signal that is input from the external device connected to the external connection terminal of the input/output unit 701 is divided into a video signal and an audio signal.
  • the video signal divided in the input/output unit 701 is supplied to the video processing unit 705
  • the audio signal divided in the input/output unit 701 is supplied to the audio processing unit 702 .
  • the video processing unit 705 adjusts the video signal supplied from the input/output unit 701 , and supplies the adjusted video signal to the display unit 706 .
  • the video processing unit 705 superimposes character information, control information, and the like on the video signal by the control of the control unit 708 , and supplies the superimposed video signal to the display unit 706 .
  • the display unit 706 displays the video represented by the video signal supplied from the video processing unit 705 .
  • the display panel included in the display unit 706 may be, for example, a liquid crystal panel, a plasma display panel, an organic EL panel, a cathode-ray tube, or the like, and is not particularly limited.
  • the audio processing unit 702 processes the audio signal supplied from the input/output unit 701 . Specifically, the audio processing unit 702 expands the audio signal into audio signals of a plurality of channels by decoding the audio signal such as a 5.1-ch signal, a 22.2-ch signal, or the like, and the audio signal that is encoded in a different format, among the audio signals supplied from the input/output unit 701 . For example, the audio processing unit 702 expands the 5.1-ch signal that is propagated by the broadcast wave into signals of 5.1-ch components, and treats the expanded signals as the audio signals of the plurality of channels. The same is true as for the 22.2-ch signal.
  • the audio processing unit 702 further performs the adjustment processing of adjusting the delay time, the level, the frequency characteristics, or the like of each of the expanded audio signals of the plurality of channels, and outputs each of the audio signals of the plurality of channels that is subjected to the adjustment processing to the amplification unit 703 .
  • the audio processing unit 702 further adjusts the audio signals based on the measurement result of the measurement unit 709 to be described.
  • the amplification unit 703 respectively amplifies the audio signals of the plurality of channels that are supplied from the audio processing unit 702 , and outputs the amplified audio signals to the speakers 704 .
  • the speakers 704 output the audio that is to be output from the front of the user (from the front of the user who views the television 7 ).
  • the three speakers 704 are configured to output the audio represented by the audio signals of three channels to be output from the front of the user (audio signals of a left (L) channel, a center (C) channel, and a right (R) channel), among the audio signals of the 5.1ch signal.
  • the speakers 704 can output the audio represented by the audio signals of three channels to be output from the front of the user, among the audio signals of the 5.1ch signal.
  • the operation unit 707 receives the operation of the user, and notifies the control unit 708 of the operation of the user that is received.
  • the operation unit 707 may receive the operation of the user via a remote controller.
  • the control unit 708 reflects the operation of the user that is received by the operation unit 707 in the control of each unit.
  • the control unit 708 detects a change in the installation position of at least one wireless speaker 8 among the plurality of wireless speakers 8 .
  • the measurement unit 709 measures the installation position of each of the plurality of wireless speakers 8 (or only the wireless speaker 8 of which the position is changed), automatically or according to the operation of the user (user instruction). At this time, the measurement unit 709 receives a sound reception signal indicating the audio acquired in the microphones 710 , and analyzes the position, the frequency characteristics, and the like of the wireless speaker 8 that is connected by wireless connection. The measurement unit 709 transmits the analysis result obtained by the analysis to the audio processing unit 702 , and reflects the analysis result in the adjustment processing (the processing of adjusting the delay time, the level, the frequency characteristics, and the like of the audio signal) to be performed in the audio processing unit 702 .
  • the microphone 710 is mounted toward the outside of the television 7 , receives the sound of the measurement audio that is output from the wireless speaker, and supplies the received sound to the measurement unit 709 .
  • the disposition of the plurality of microphones 710 similar to the disposition of the microphone units 301 described in the first embodiment, it is preferable that four or more microphones 710 are disposed such that at least one microphone 710 and other microphones 710 are not positioned on the same plane. In the present embodiment, the microphones 710 are disposed at five locations in total of the four corners and the back of the television 7 .
  • the microphones 710 are incorporated in the television 7 , and thus it is possible to maintain substantially constant the relative positions of the microphones 710 with respect to the television 7 in the sound system 20 .
  • the installation position of the television 7 is usually unlikely to be moved, and thus it is possible to more accurately maintain the relative position between the microphone 710 and each of the wireless speakers 8 .
  • the television 7 measures the moved installation position of only the wireless speaker 8 that is moved and reflects only the measurement result in the adjustment processing of the audio signal in the audio processing unit 702 . Therefore, it is possible to update the disposition of the entire sound system 20 and provide a good audio reproduction environment.
  • the television 7 can recognize the reproduction environment by recognizing the relative position of the speaker 704 with respect to the television 7 .
  • the sound system 20 may perform the measurement of the entire sound system 20 based on the operation of the user, or automatically perform the measurement of the entire sound system 20 when the movement of the television 7 is detected by the sensor incorporated in the television 7 .
  • the wireless communication unit 711 performs wireless communication with the wireless speakers 8 .
  • FIG. 6 is a block diagram illustrating an outline of the configuration of the wireless speaker 8 according to the present embodiment.
  • the wireless speaker 8 includes a wireless communication unit 801 , an audio processing unit 802 , an amplification unit 803 , a speaker 804 , an operation unit 805 , a control unit 806 , a rechargeable battery 807 , and a sensor 808 .
  • the wireless communication unit 801 communicates with the television 7 by wireless communication, receives the audio signal from the television 7 , and outputs the received audio signal to the audio processing unit 802 .
  • the wireless communication unit 801 transmits the power state of the wireless speaker 8 , a control signal such as output level adjustment or the like, the charging status of the rechargeable battery 807 , error information of each unit, and the like, to the television 7 .
  • the audio processing unit 802 processes the audio signal received by the wireless communication unit 801 , and supplies the audio signal to the amplification unit 803 .
  • the contents of the processing on the audio signal in the audio processing unit 802 may include, for example, level adjustment, frequency characteristics adjustment, and the like.
  • the amplification unit 803 amplifies the audio signal supplied from the audio processing unit 802 , and drives the speaker 804 so as to output the audio represented by the audio signal.
  • the speaker 804 outputs the audio.
  • the speaker 804 may be configured by a plurality of speaker units. In other words, in the speaker 804 , a plurality of speakers having the same type may be connected to each other, or a plurality of speakers having a different reproduction band may be connected to each other.
  • the operation unit 805 receives the operation of the user. Specifically, the operation unit 805 receives the operation of the user such as power ON, power OFF, a pairing operation of the wireless communication, or the like.
  • the control unit 806 controls each unit of the wireless speaker 8 , based on the control signal from the television 7 that is received by the wireless communication unit 801 , and the operation of the user that is received by the operation unit 805 .
  • the control unit 806 monitors the output (sensor signal) from the sensor 808 , and monitors (detects) whether the installation position of the wireless speaker 8 is moved.
  • the detection of the movement of the installation position of the wireless speaker 8 can be managed by the movement flag, similar to the detection by the control unit 105 included in the AV amplifier 1 according to the first embodiment, and thus the detailed description thereof is omitted here.
  • the rechargeable battery 807 is a rechargeable battery serving as an operating power supply of the wireless speaker 8 .
  • the rechargeable battery 807 appropriately supplies the power charged in the rechargeable battery 807 to each unit of the wireless speaker 8 .
  • the sensor 808 is a sensor that detects whether the wireless speaker 8 is moved.
  • the sensor 808 may be, for example, a switch that detects whether the wireless speaker is placed on the floor, or an acceleration sensor, and is not particularly limited. In a case where an acceleration sensor is used as the sensor 808 , even when the wireless speaker 8 is moved in such a way in which the wireless speaker is dragged on the floor, the movement of the wireless speaker can be also detected reliably.
  • FIG. 7 is a flowchart illustrating a flow of the processing in the sound system 20 according to the present embodiment.
  • the power of the television 7 is ON by the user in a state where the reproduction apparatus 5 , an antenna line, and the like are connected to the television 7 .
  • control unit 708 included in the television 7 determines whether or not the configuration of the wireless speaker 8 that constitutes the sound system 20 in conjunction with the television 7 (pairing between the television 7 and the wireless speaker 8 ) is completed (step S 201 ).
  • the control unit 708 executes a speaker configuration mode (step S 202 ).
  • a speaker configuration mode In the television 7 , various configurations are not made immediately after purchase, and thus there is a need to perform various configurations at the time of initial starting. In such a case, the control unit 708 performs various configurations of the television 7 , and after the various configurations are completed, executes the speaker configuration mode.
  • the television can detect that the installation area is changed by receiving the broadcast wave, thereby recognizing that the installation area is significantly changed due to a move or the like. Even in such a case, it is assumed that various configurations are not made, and the television 7 executes the speaker configuration mode after the various configurations are completed.
  • the control unit 708 executes the configuration of the wireless speaker 8 that is used in conjunction with the television 7 .
  • pairing is needed for the use in combination with other devices.
  • the combination of the wireless speaker 8 and the television 7 is configured, and wireless connection is established.
  • the configuration of the combination can be executed by the operation of the television 7 and pressing a pairing button of the wireless speaker 8 (for example, selecting the pairing button in the configuration screen displayed on the display unit 708 of the television 7 ).
  • the plurality of wireless speakers 8 to be used in combination with the television 7 are registered in this way, and wireless connection is established.
  • the control unit 708 registers a connection list for managing the wireless speakers 8 in which the wireless communication is established as a list, and updates the connection list (step S 203 ).
  • the connection list may be stored in a storage unit (not illustrated) included in the television 7 . Even in a case where a wireless speaker 8 is added later, the speaker configuration can be performed by executing the speaker configuration mode according to the same procedure and updating the connection list.
  • control unit 708 determines whether or not the movement flag is in a reset state (in the present embodiment, the value of the movement flag is “0”) (step S 204 ).
  • the television 7 executes a speaker measurement mode (step S 205 ).
  • the television 7 sequentially transmits the measurement audio signal to each of the plurality of wireless speakers 8 in which the wireless connection is established via the wireless communication unit 711 , and outputs the measurement the audio indicating the measurement audio signal from each wireless speaker 8 .
  • the television 7 measures the position of each wireless speaker 8 , by receiving the sound of the measurement audio that is output from the wireless speaker 8 by the plurality of microphones 710 incorporated therein, and analyzing the measurement audio by the measurement unit 709 .
  • the measurement processing is executed for all of the wireless speakers 8 in which the wireless connection is established (that is, all wireless speakers 8 registered in the connection list).
  • the control unit 708 of the television 7 resets the movement flag corresponding to each of the wireless speakers 8 (sets the value of the movement flag to “1”).
  • the control unit 708 notifies the audio processing unit 702 of the position information indicating the measured installation position of the speaker.
  • the audio processing unit 702 executes the adjustment processing on the signal to be output from each wireless speaker 8 , such as adjustment of the delay time, adjustment of the frequency characteristics, addition, and the like, based on the position information of the speaker received from the control unit 708 , and adjusts the reproduction balance of each wireless speaker 8 .
  • the audio processing unit 702 can satisfactorily correct the influence of the wireless speaker 8 and the room, by generating a correction impulse response using the impulse response from each wireless speaker 8 of which the position is measured to the microphones 710 , and inserting the correction impulse response into the signal to be transmitted to each wireless speaker.
  • the power of the television 7 is OFF by the operation of the operation unit 707 by the user.
  • the control unit 708 issues an instruction of power-off to each unit of the television 7 , and outputs an instruction for power-off to the wireless speaker 8 via the wireless communication unit 711 . It is preferable that the wireless communication unit 711 is turned off after outputting the instruction for power-off to the wireless speaker 8 .
  • the operation unit 805 transmits the instruction for power-off to the audio processing unit 802 and the amplification unit 803 .
  • the wireless speaker 8 transitions to a standby state with reduced power consumption.
  • the control unit 806 transitions to a state of waiting for a signal from the wireless communication unit 801 , the operation unit 805 , and the sensor 808 , and continues to monitor the signal.
  • the sensor 808 reacts to the movement and performs a notification to the control unit 806 .
  • the control unit 806 sets the movement flag to “1”. It is considered that the wireless speaker 8 is put away or moved for charging by the user.
  • the control unit 708 of the television 7 performs processing of activating each unit of the television 7 , and performs processing of requesting a response to the plurality of wireless speakers 8 via the wireless communication unit 711 .
  • the control unit 806 of each wireless speaker 8 responds to the television 7 via the wireless communication unit 801 , and wireless connection between the television 7 and the plurality of wireless speakers 8 is re-established.
  • the control unit 708 of the television 7 checks the state of each wireless speaker based on the connection list that is held. In order to check the state of the wireless speaker 8 , along with the response from the wireless speaker 8 , the state information indicating whether each wireless speaker 8 can be activated, the information indicating where each wireless speaker 8 is moved, the movement the flag, and the like are acquired.
  • the television 7 can acquire the number of the wireless speakers 8 that can be activated and the presence or absence of the movement of the wireless speakers 8 through the processing.
  • the control unit 708 of the television 7 displays a message of “The movement of the speaker is detected. Start to perform measurement?” on the display unit 706 through the video processing unit 705 , and requests the measurement of the position of the wireless speaker 8 to the user. In this state, the television 7 issues an activation instruction to the wireless speaker 8 that can be activated, and performs processing of making the television 7 and the wireless speaker 8 being in an operation state.
  • the sound system 20 When a measurement instruction is issued by the operation of the operation unit 707 from the user, the sound system 20 enters the speaker measurement mode and performs the measurement. At this time, the position of only the wireless speaker 8 of which the position is moved may be measured. After the measurement is performed, the television 7 issues an instruction for resetting the movement flag (setting the value to “0”) to the wireless speaker 8 . Even when there is a wireless speaker 8 that exist in the connection list but cannot be activated, there is no need for the measurement because there is no change in the position of each wireless speaker 8 , and thus it is possible to correspond to the change in the processing contents of the audio processing unit 702 .
  • the movement flag remains set to “1”. In this state, when the channel is switched by the operation of the television 7 from the viewer, when the input is switched, or when the broadcasting program that is viewing is changed, there is a case where the status on the audio signal is changed.
  • the audio output mode in the television 7 is changed to a mode in which another speaker other than the speaker incorporated in the television 7 is used
  • the television 7 may display a message of requesting re-measurement from the user at the timing when the status on the audio signal is changed, and measure the installation position of the wireless speaker according to a user operation. In this way, the sound system 20 can request measurement at an appropriate timing by detecting the state change of the television 7 that displays an image.
  • the number of channels of the audio signal (2-ch, 5.1-ch, 7.1-ch, or 22.2-ch, or the like) can be determined by referring to an identifier representing the number of channels (for example, meta information or the like that is provided by a broadcast wave or from package media).
  • the identifier may include, for example, any one of the number of channels of the audio indicated by the audio signal, an encoding method, and language setting.
  • the identifier may be supplied, for example, from the television 6 connected to the AV amplifier 1 via a HDMI or the like.
  • a detection device such as an individual identification holder, an individual identification tag, or the like may be installed in advance at the position at which the wireless speaker 8 is installed.
  • the wireless speaker 8 is installed at the position at which the individual identification tag or the like is set, and the measurement of the position of the wireless speaker 8 is performed.
  • the wireless speaker 8 is returned at the measured position by the individual identification tag or the like.
  • the control unit 708 detects a change in the installation position of the wireless speaker 8 (after the movement flag is set to “1”), when the change is detected by the detection device corresponding to the speaker of which the change is detected (that is, when the wireless speaker 8 is returned at the original position), the measurement unit 709 does not perform the measurement of the installation position of the wireless speaker 8 .
  • the detection device is a detection device that detects only the corresponding wireless speaker 8 when the wireless speaker 8 is installed at the position to be installed.
  • the detection device may be, for example, a device using short-range wireless communication or a device using a bar code or the like.
  • the detection device is not particularly limited, and may be a device having a structure that corresponds to the wireless speaker 8 one-to-one such a key. When the detection device having such a structure is used, it is possible to accurately restore the installation position of the wireless speaker.
  • the installation position of the wireless speaker 8 is acquired by measuring the position from the speed of the sound wave that propagates through a space between the wireless speaker 8 and the microphone 710 .
  • the measurement method is not particularly limited. For example, a measurement method using ultrasonic waves may be used, or an optical measurement method using a camera may be used. Even in these cases, when the position of the wireless speaker 8 is changed during the measurement or after the measurement, the normal reproduction is difficult, and thus it is possible to exhibit the effect of reducing the number of the measurement.
  • the measurement unit 709 may measure the installation position of the wireless speaker 8 by measuring the relative position between the microphone 710 and the wireless speaker 8 .
  • the measurement unit 709 may measure the installation position of each of the plurality of wireless speakers 8 , automatically or according to a user operation.
  • the installation position of the television 7 it is considered that the user who uses the sound system 10 changes the position or the orientation of his or her own body when using the sound system 10 .
  • the installation position of the wireless speaker 8 is measured again, and thus it is possible to provide a good audio reproduction environment to the user.
  • Each block of the AV amplifier 1 (in particular, the control unit 105 , the measurement unit 106 , the audio processing unit 102 ), each block of the control unit of the television 7 (in particular, the control unit 708 , the measurement unit 709 , the audio processing unit 702 ), and each block of the wireless speaker 8 (in particular, the control unit 806 , the audio processing unit 802 ) may be realized by logic circuits (hardware) formed using integrated circuits (IC chips) or the like, and may be realized by software using a central processing unit (CPU).
  • logic circuits hardware
  • IC chips integrated circuits
  • CPU central processing unit
  • each block of the AV amplifier 1 , the television 7 , and the wireless speaker 8 includes a CPU that executes instructions of a program which is software for realizing each function, a read only memory (ROM) or a storage device (these are referred to as “recording medium”) in which the program and various data are recorded to be readable by a computer (or CPU), a random access memory (RAM) that develops the program, and the like.
  • the object of the present invention is achieved by reading the program from the recording medium and executing the program by the computer (or CPU).
  • “non-temporary tangible medium”, for example, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used.
  • the program may be supplied to the computer through any transmission medium that can transmit the program (a communication network, a broadcast wave, or the like).
  • the present invention can be also realized in a form of a data signal in which the program is embedded in a carrier wave that is embodied by electronic transmission.
  • the present invention is not limited to each of the above-described embodiments, and can be freely modified in various ways within a scope described in the claims.
  • an embodiment obtained by appropriately combining each technical means disclosed in different embodiments also falls within a technical scope of the present invention.
  • by combining technical means disclosed in each embodiment it is possible to form a new technical feature.
  • a sound apparatus that supplies an audio signal to each of a plurality of speakers, including: a detection unit that detects a change in the installation position of at least one speaker; a measurement unit that measures the installation position of at least the speaker of which the installation position is changed among the plurality of speakers, automatically or according to a user operation, after the change is detected by the detection unit; and an adjustment unit that adjusts the audio signal based on the measurement result of the measurement unit.
  • the sound apparatus measures the installation position of the speaker by the measurement unit. Accordingly, the sound apparatus can prevent the measurement of the position of the speaker from not being performed in a case where the position of the speaker is changed. On the other hand, in a case where the installation position of the speaker is not changed, the measurement of the position of the speaker is not performed.
  • the sound apparatus can prevent the measurement of the position of a speaker from not being performed in a case where the position of the speaker is changed, and prevent the measurement of the position of the speaker from being performed more than necessary.
  • the speaker is configured to detect the presence or absence of the movement of own device during a period for which the sound apparatus is not activated, and the detection unit is configured to check the presence or absence of the movement so as to detect the change in the installation position of the speaker when the sound apparatus is activated.
  • the sound apparatus when the sound apparatus is activated, the sound apparatus can check the presence or absence of the change in the position of the speaker during a period for which the sound apparatus is not activated, and thus it is possible to further enhance user convenience.
  • the measurement unit measures the installation position of each of the plurality of speakers, automatically or according to a user operation.
  • the sound apparatus in a case where the position of the speaker is changed, when the number of channels of the audio signal, the sound apparatus can measure the position of the speaker.
  • the measurement unit does not perform the measurement of the installation position.
  • the sound apparatus does not perform the measurement. Accordingly, in a case where there is no need to measure the position of the speaker, it is possible to prevent the measurement of the position of the speaker from being performed more efficiently.
  • the measurement unit is configured to measure the installation position of each of the plurality of speakers, automatically or according to a user operation, after the movement of the sound apparatus is detected.
  • the sound apparatus can efficiently measure the position of the speaker.
  • a television receiver is a television receiver including each unit that is included in the sound apparatus.
  • the measurement unit is configured to refer to data that is generated by a specific device so as to measure the installation position of the speaker, and the specific device is incorporated.
  • the television receiver can exhibit the same effect as that of the sound apparatus.
  • a speaker device is a speaker device that outputs the audio indicated by an audio signal when the audio signal is supplied from the sound apparatus.
  • the speaker device includes an output unit that outputs information for causing the sound apparatus to detect a change in the position of the speaker device, toward the sound apparatus, in a case where the position of the speaker device is changed.
  • the speaker device outputs the information to the sound apparatus in a case where the position of the speaker device is changed. Accordingly, the speaker device can cause the sound apparatus to detect that the position of the speaker device is changed. Thus, it is possible to prevent the measurement of the position of the speaker from not being performed in a case where the position of the speaker in the sound apparatus is changed, and prevent the measurement of the position of the speaker from being performed more than necessary in the sound apparatus.
  • the speaker device preferably, further includes a detection unit that detects the movement of the speaker device in a case where the speaker device is moved.
  • the output unit outputs information indicating that the speaker device is moved, as the information, in a case where the movement of the speaker device is detected by the detection unit.
  • the speaker device can detect that the speaker is moved, by the detection unit. Accordingly, in a case where the movement of the speaker device is detected by the detection unit, the speaker device can output the information to the sound apparatus.
  • the speaker device is configured to be in a standby state during a period for which the sound apparatus is not activated, and the detection unit is configured to detect the movement of the speaker device in a case where the speaker device is moved during the period of the standby state.
  • the speaker device can detect that the speaker device is moved. Accordingly, the speaker device can prevent the measurement of the position of the speaker device from not being performed by the sound apparatus, in a case where the speaker device is moved during the period for which the sound apparatus is not activated.
  • An audio signal adjustment method is an audio signal adjustment method performed by a sound apparatus that supplies an audio signal to each of a plurality of speakers.
  • the audio signal adjustment method includes: a detection step for detecting a change in the installation position of at least one speaker; a measurement step for measuring the installation position of each of the plurality of speakers, automatically or according to a user operation, after the change is detected by the detection step; and an adjustment step for adjusting the audio signal based on the measurement result in the measurement step.
  • the audio signal adjustment method can exhibit the same effect as that of the sound apparatus.
  • the sound apparatus according to each aspect of the present invention may be realized by a computer.
  • a program of the sound apparatus that realizes the sound apparatus using the computer by causing the computer to operate as each unit included in the sound apparatus, and a computer-readable recording medium in which the program is recorded are also included in the scope of the present invention.
  • the present invention can be preferably used for a sound apparatus such as an AV amplifier, a television receiver, and the like that supplies an audio signal to a plurality of speakers.
  • a sound apparatus such as an AV amplifier, a television receiver, and the like that supplies an audio signal to a plurality of speakers.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Stereophonic System (AREA)
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  • Television Receiver Circuits (AREA)
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US15/319,393 2014-06-17 2015-05-26 Sound apparatus, television receiver, speaker device, audio signal adjustment method, and recording medium Active US9986358B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2014-124795 2014-06-17
JP2014124795 2014-06-17
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